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.github/workflows/publish-image.yml

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+name: Publish image
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+env:
+  BUILD_DEBIAN_TAG: bookworm-20240311-slim
+  BUILD_TAG: ghcr.io/${{ github.repository_owner }}/redbean-build:${{ github.sha }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name != 'pull_request' }}
+    steps:
+      - name: Checkout
+        uses: actions/[email protected]
+
+      - name: Set up Docker Buildx
+        uses: docker/[email protected]
+
+      - name: Log in to Docker Hub
+        uses: docker/[email protected]
+        with:
+          registry: ghcr.io
+          username: ${{ secrets.GH_USR }}
+          password: ${{ secrets.GH_PAT }}
+          logout: true
+
+      - name: Build and export build image
+        uses: docker/[email protected]
+        with:
+          load: true
+          push: false
+          context: .
+          file: ./Dockerfile.redbean-build
+          build-args: BUILD_DEBIAN_TAG=${{ env.BUILD_DEBIAN_TAG }}
+          tags: |
+            ${{ env.BUILD_TAG }}
+      
+      - name: Build and push final image
+        uses: docker/[email protected]
+        with:
+          push: true
+          context: .
+          file: ./Dockerfile.redbean-scratch
+          build-args: |
+            GIT_REPO_OWNER=${{ github.repository_owner }}
+            BUILD_TAG=${{ github.sha }}
+          tags: |
+            ghcr.io/${{ github.repository_owner }}/redbean:latest